diff --git a/.github/workflows/pull_request.yml b/.github/workflows/pull_request.yml
index f115aa04..e015d2d8 100644
--- a/.github/workflows/pull_request.yml
+++ b/.github/workflows/pull_request.yml
@@ -14,7 +14,7 @@ jobs:
         ruby: [ '3.1', '3.2', '3.3' ]
     name: Ruby v${{ matrix.ruby }}
     steps:
-    - uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4
+    - uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29 # v4
     - uses: ruby/setup-ruby@v1
       with:
         ruby-version: ${{ matrix.ruby }}